Vehicle-mounted high and low voltage power intelligent switching and stabilizing method and system

Abstract

The application relates to the technical field of power supply control, and discloses a kind of vehicle-mounted high-low voltage power supply intelligent switching voltage stabilizing method and system, the method comprises: the driving operation signal of target vehicle, vehicle state information and power supply state data are collected;According to driving operation signal and vehicle state information, sudden change prediction demand is predicted, and the health state grade of each power supply branch is evaluated in stages;The switching demand signal is obtained by comparing sudden change prediction demand and current remaining power supply capacity, and the candidate power supply branch is selected in combination with the health state grade;According to the candidate power supply branch, the pre-connection and pre-regulation of pre-charging circuit are carried out, and the output impedance is adjusted according to sudden change prediction demand;Based on the pre-regulation result and the dynamic impedance adjustment result, smooth switching is carried out, and the switching timing is adjusted according to the current ripple characteristics;Finally, the original power supply branch is switched to standby state, and the operating state parameters are continuously collected.The application solves the problem of insufficient power supply continuity and voltage stabilization precision caused by switching lag in the prior art.